I recently had someone try to argue that cricothyroid action doesn't dominate in falsetto and thyroarytenoid action doesn't dominate in chest.
This kind of ignorance about the voice is scary. If when singing falsetto where only the edges of the cords vibrate (no thyroaryntenoid participation) then pray tell what stretches the cords to thin them and tighten them more in order to change the pitch if not cricothyroid action? Ridiculous ignorance.
The same for chest. Since TA is not active in falsetto and is less active in headvoice how is it not more dominant in chest? Again, the ignorance explains a lot about why the vocal world is such a mess.